Using the realloc() function

/* 1704.c: Using the realloc() function */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* function declaration */
void StrCopy(char *str1, char *str2);
/* main() function */
main()
{
    char *str[4] = {"There's music in the sighing of a reed;",
    "There's music in the gushing of a rill;",
    "There's music in all things if men had ears;",
    "There earth is but an echo of the spheres.\n"
    };
    char *ptr;
    int i;

    int termination = 0;
    ptr = malloc((strlen(str[0]) + 1) * sizeof(char));
    if (ptr == NULL){
        printf("malloc() failed.\n");
        termination = 1;
    }
    else{
        StrCopy(str[0], ptr);
        printf("%s\n", ptr);
        for (i=1; i<4; i++){
            ptr = realloc(ptr, (strlen(str[i]) + 1) * sizeof(char));
            if (ptr == NULL){
                printf("realloc() failed.\n");
                termination = 1;
                i = 4; /* break the fro loop */
            }
            else{
                StrCopy(str[i], ptr);
                printf("%s\n", ptr);
            }
        }
    }
    free(ptr);
    return termination;
}
/* function definition */
void StrCopy(char *str1, char *str2)
{
    int i;

    for (i=0; str1[i]; i++)
    str2[i] = str1[i];
    str2[i] = '\0';
}